All conversions
| Unit | Value | Copy |
|---|---|---|
| Pascal (Pa) | — | |
| Hectopascal (hPa) | — | |
| Kilopascal (kPa) | — | |
| Megapascal (MPa) | — | |
| Millibar (mbar) | — | |
| Bar (bar) | — | |
| Pound per square inch (psi) | — | |
| Standard atmosphere (atm) | — | |
| Millimetre of mercury (mmHg) | — | |
| Torr (Torr) | — | |
| Inch of mercury (inHg) | — |
Convert tyre pressures, weather readings, blood-pressure units and engineering specifications between all common pressure units.
How to use the Pressure Converter
- 1 Type a value in either box — the conversion works in both directions.
- 2 Choose the units to convert pressure from and to, or click any row in the table.
- 3 Use the swap button to reverse the conversion, then copy the result.
Formula
1 bar = 100,000 Pa 1 atm = 101,325 Pa 1 psi = 6,894.757 Pa 1 mmHg ≈ 133.322 Pa
Worked examples
Input: 32 psi
Result: 2.206 bar
220.6 kPa
Input: 1013.25 mbar
Result: 1 atm
29.92 inHg
Gauge vs. absolute pressure
Tyre gauges show gauge pressure — the amount above atmospheric pressure. Absolute pressure adds about 1 atm (14.7 psi). This converter changes units only; it does not add or remove atmospheric pressure.
Where each unit is used
- psi — tyres and hydraulics in the US
- bar / kPa — tyres and engineering in most of the world
- hPa / mbar — weather maps (identical values)
- mmHg — blood pressure and vacuum
Frequently asked questions
How many psi is 1 bar?
About 14.5038 psi.
Is mmHg the same as torr?
Almost: 1 torr is exactly 1/760 atm, and 1 mmHg differs by less than one part in a million.
Are hPa and mbar the same?
Yes, 1 hectopascal equals 1 millibar.
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